I am a very light sleeper...I can only have my LD's using the wake-back-to-bed method. When I do go back to bed, I fall into such a deep, deep "trance" type sleep...and my LD's are SO vivid ...and unbelievably real...when I do awake (after several awake checks) I feel weak & drained.....I don't know...that's how it has always been for me with LD's. I mean don 't get me wrong, I love it!